Add cbase package

packages/cbase.rb

+require 'package'
+
+class Cbase < Package
+  description 'cbase is a C library of useful functions that simplify systems software development on System V UNIX.'
+  homepage 'http://www.hyperrealm.com/main.php?s=misctools'
+  version '1.3.7'
+  source_url 'http://www.hyperrealm.com/cbase/cbase-1.3.7.tar.gz'
+  source_sha256 'c4d155686ac2e9d1480319de311967fadad745a6ab6971d53d495d9a9e52dc47'
+
+  def self.build
+    system './configure'
+    system 'make'
+  end
+
+  def self.install
+    system "make", "DESTDIR=#{CREW_DEST_DIR}", "install"
+  end
+end